After winning the "Volant V" in 1977 at the André Pilette Racing School, Zolder, Boutsen entered the Belgian Formula Ford 1600 championship and won it in 1978 with 15 victories in 18 races.[1] He also entered the 1978 Spa 24 Hours race, the very last auto race on the old 14 km (8.7 mi) Spa-Francorchamps circuit- driving a Toyota Trueno.[2] For 1979 he moved to Formula 3, winning three races in 1980 and second place in the European title race, behind Michele Alboreto.[1] In 1981 he moved to Formula 2 and was again second in the European championship, including winning at the 14-mile Nürburgring- this time behind Geoff Lees.[1]

He also entered the 1981 24 Hours of Le Mans. The race started at 3pm – one hour earlier than usual due to the Parliamentary elections held on the same weekend. At 4:06pm Boutsen suffered a massive accident just after the Hunaudières kink, some 400 metres (0.25 mi) before the Mulsanne bosse (the "hump") when his WM P81-Peugeot was travelling at some 350 km/h (217 mph). A suspension piece had failed and the car hit the guard-rail losing the entire rear end. Boutsen was untouched, but the debris field of hurled parts and bodywork was spread over 150 metres (490 ft). Three marshals were struck by the debris. One of them, Thierry Mabilat, was killed - struck in the chest by a detached piece of the guard rail. Two of his colleagues, Claude Hertault and Serge David (who lost an arm), were seriously injured.

In 1983 he paid $500,000 for a drive in Formula One and made his debut with Arrows at his home race, the 1983 Belgian Grand Prix at the shortened 7 km (4.3 mi) Spa.[1] While he scored no points in 1983 his careful handling and close performance compared to experienced teammate Marc Surer. With backing from Barclay cigarettes he remained with the team for a further three seasons. The first saw Arrows struggle with their difficult firstturbocharged car, with powerful BMW turbo engines but poor handling. Boutsen scored points twice in the old Cosworth DFV powered A6 and once in the turbo machine. His second season saw several notable results, including 2nd place at Imola. Boutsen crossed the line third, behind Alain Prost and Elio de Angelis but after the race, Prost was disqualified because his car was 2 kg underweight. Three more points scores saw him 11th overall in the standings. A final season with Arrows saw no points for Boutsen in an uncompetitive car, but in parallel to F1 he drove for the Walter Brun team in Group C and clinched the World Championship title with them in 1986, winning that year's Spa 1000 km.

Boutsen got his big chance when he switched to the works Ford F1 team, Benetton, for the 1987 season as teammate to Teo Fabi. While the package wasn't a race winner it did allow him to run regularly in the top 6. He scored points in six races, his best being awarded 3rd place in Adelaide after the disqualification of Ayrton Senna's Lotus and moved to 8th overall. At the Australian Grand Prix, Boutsen was furious with Fabi when the Italian refused to let his teammate lap him for a number of laps. When Boutsen confronted Fabi about this after the race, a frustrated Fabi (who had been unable to find an F1 drive for 1988), told the Belgian to "come back and see me when you have a pole position". Fabi scored no wins in his F1 career but did have 3 poles to his name while at that stage Boutsen could only boast his 2nd place at Imola in 1985.

1988 saw Boutsen with a new teammate, the fast, chain-smoking Italian Alessandro Nannini. When Cosworth stopped development of their turbocharged V6 engine, Benetton were forced to switch to normally aspirated Ford DFRV8 engines in anticipation of the banning of turbos in 1989. Boutsen's consistency, mechanical sympathy and speed in the Rory Byrne designed Benetton B188 saw him score points in 10 of the 16 races, including five 3rd-place finishes (all behind the all-conquering McLaren-Honda's), and place 4th overall as the best non-turbo driver in the field.

His reputation as a reliable, fast driver with good development skills saw Frank Williams sign him on a two-year contract to replace Nigel Mansell (who was off to Ferrari) and drive the new V10Renault powered Williams FW12C. 1989 began with Boutsen on the back foot due to a heavy pre-season testing crash in Rio and because veteran teammate Riccardo Patrese had a major resurgence in form. However at the Canadian Grand Prix, Boutsen drove well in wet conditions and took his maiden victory after Senna suffered a late engine failure. Although it was a welcome win (Boutsen became the first new winner in F1 since former Arrows teammate Gerhard Berger had won the 1986 Mexican Grand Prix for Benetton. Between then only Senna, Prost, Nigel Mansell, Nelson Piquet and Berger had won a race), it was considered a lucky win for the Belgian as he had been last at one stage and had a full 360° spin, though luckily he managed to keep his car off the walls. He managed to catch and pass Patrese who was suffering with a loose undertray and took the lead 3 laps from the end when the Honda V10 engine in Senna's McLaren MP4/5 seized. Three more podium finishes came before Boutsen rounded the year off with a second victory at the rain-soaked Australian Grand Prix. Ironically Boutsen had been one of the drivers protesting about the conditions at the circuit before the race.

1990 saw more consistent points scoring drives, including his third and final Grand Prix victory - a lights-to-flag victory in Hungary where he took his first pole position and held off sustained pressure from Alessandro Nannini (Benetton) and Ayrton Senna (McLaren) to win. However, with Nigel Mansell available in 1991, Williams Renault felt they needed a 'star' driver to put together a championship bid. Despite Boutsen winning three races in two years to Patrese's one, the team felt that Patrese had been more consistent (and had worked well with Mansell in 1988) and decided to keep the Italian to drive alongside Mansell.

With no vacancies among the top teams Boutsen had to drop down to the Ligier team. Despite having a sizeable budget and Lamborghini V12 engines, the JS35 was an uncompetitive car and Boutsen was frequently unable to disguise his disgust with the machinery given to him. The arrival of Renault engines in 1992 improved matters a little and in his final race for the team he scored 5th place, his first points since leaving Williams.

Initially he was unable to find a drive for 1993 but Barclay secured him a slot at Jordan, replacing Ivan Capelli. Boutsen was rusty, too tall for the car and largely outpaced by young teammate Rubens Barrichello, failing to score any points in ten races. With Eddie Jordan keen to bring in younger, well-sponsored drivers to the seat the decision was taken to turn Boutsen's home race into a farewell event, though he retired on the first lap.

For 1994, Boutsen was hired by Ford Motorsport to lead their works challenge on the newly created Super Tourenwagen Cup in Germany. Driving a factory prepared Ford Mondeo built by Eggenberger Motorsport, that first season was a learning year for both Boutsen and the team.

The following year, Boutsen was joined by his old Williams teammate Riccardo Patrese, but the season was a disaster. Attempting to follow Audi's lead by developing a four-wheel drive car, the Mondeo was totally uncompetitive.

Boutsen started in only the first four races in 1996 before leaving the team and turning his attention to sports car racing. After three years of limited success, Ford pulled the plug on the project at the end of that season to focus solely on the British series.

Boutsen then drove sports cars in the US, driving for Champion Racing in a Porsche 911 GT1, alongside Bill Adam and Hans Stuck. The trio finished 2nd in class at the 24 Hours of Daytona in 1997, Boutsen won the GT-One US Championship with the Champion Racing in 1998. After a crash at Le Mans in 1999 at the wheel of a Toyota GT-One he retired from racing altogether.[1]

Today Boutsen runs his own company, Boutsen Aviation, in Monaco.[3] Its business is the "Sale and Acquisition of Business Jets". He founded the company in 1997 with his wife Daniela and up to May 2011, the company had sold 205 aircraft, ranging from Airbus Corporate Jets to Cessna Citation. He is also co-owner of Boutsen Energy Racing alongside his brother-in-law Olivier Lainé and Georges Kaczka. The team competes in the Formula Le Mans class in the Le Mans Series. Boutsen also runs cars in Formula Renault and Eurocup Mégane Trophy.